consider the advances for the gui in general.
It need not be a table. multiple mouse pointers, looks rather useful in how they're implemented. touch a picture with two fingers and you can enlarge it, move it, spin it! that tech surely isn't 10k, but more like an expansion to vista.
Heck I remember when 30" plasmas were low crappy res, and 10k back in nov 2001 (my first maximum pc magazine issue!). So even as far as commercial lines go, this is a nice start.
The toughest thing they had imo, was detecting that a wifi enabled device was on the table. It's easy to detect that a wifi device is near, that one is in range. I haven't a clue how they'd see if one is on the table, unless they're using multiple wifi detection sensors to triangulate it. Otherwise, say you got 2 zunes on the table. The wifi will tell you there's 2 zunes. The touch screen, tells you there's two objects on the table - but that's it. a precise setup to detect the location of a wifi object can't be cheap at all - but that is unnecessary. detecting a zune is in wifi range, and drawing a random circle somewhere would be fine.